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| 1. |
If x={ },then n(Px)) is ______ |
| Answer» GIVEN A and B are two SETS with number of elements p and Q respectively.The cartesian product of A and B=A×B={(a,b):(a∈A) and (b∈B)}Number of elements in A×B=∣A×B∣=∣A∣.∣B∣=pqAny RELATION from A to B is a subset of A×B. Hence number of RELATIONS from A to B is the number of subsets of A×B | |